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echo srm-210 misfires and dies after 20 minutes #4466792
07/21/17 11:18 PM
07/21/17 11:18 PM
Joined: Nov 2009
Posts: 5,219
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,219
Houston, Texas
I retired this machine due to lack of power, but it turned out to just be a clogged exhaust port, so I decided for some dumb reason I was going to get it going again. It had been sitting, so I put a new carb on it a primer bulb a new fuel lines, then I put a new recoil on it because it broke. It hadn't been used in a couple years, but I got the carb tuned with no issues and thought I was good to go. I gave it a test on one yard thinking it was fixed, but then it started misfiring and didn't want to stay running unless you held the throttle down WOT. Im thinking it's the coil, but what are the chances it's just a bad spark plug? Why does it take 20 minutes for this to happen? Is it overheating?

Last edited by motor_oil_madman; 07/21/17 11:19 PM.

2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: echo srm-210 misfires and dies after 20 minutes [Re: motor_oil_madman] #4466798
07/21/17 11:26 PM
07/21/17 11:26 PM
Joined: Nov 2013
Posts: 366
Fly-over country
zuluplus30 Offline
zuluplus30  Offline

Joined: Nov 2013
Posts: 366
Fly-over country
I had the same problem after a carb and fuel line change on my 210. Turns out I had the fuel supply and return lines backwards to the carb. Switched them and works like a charm now.

Re: echo srm-210 misfires and dies after 20 minutes [Re: motor_oil_madman] #4467013
07/22/17 10:15 AM
07/22/17 10:15 AM
Joined: Apr 2008
Posts: 179
Michigan
motorcity Offline
motorcity  Offline

Joined: Apr 2008
Posts: 179
Michigan
You may want to check the flywheel for a sheared keyway. I just picked up an Echo Gt225, and the flywheel key was sheared. And on this machine, the key is machined into the flywheel. So I had to replace the whole flywheel.

Re: echo srm-210 misfires and dies after 20 minutes [Re: motor_oil_madman] #4467053
07/22/17 11:09 AM
07/22/17 11:09 AM
Joined: Nov 2011
Posts: 193
New Jersey
Ursatdx Offline
Ursatdx  Offline

Joined: Nov 2011
Posts: 193
New Jersey
Be sure the small air vent in the gas cap is not blocked/clogged with dirt.
Happened to me on a lawn tractor. Loosened the gas cap and problem went away.
Cleaned gas cap vent and all was good.


"If there must be trouble, let it be in my day, that my child may have peace." --- Thomas Paine
Re: echo srm-210 misfires and dies after 20 minutes [Re: Ursatdx] #4468004
07/23/17 12:54 PM
07/23/17 12:54 PM
Joined: Nov 2009
Posts: 5,219
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,219
Houston, Texas
Originally Posted By: Ursatdx
Be sure the small air vent in the gas cap is not blocked/clogged with dirt.
Happened to me on a lawn tractor. Loosened the gas cap and problem went away.
Cleaned gas cap vent and all was good.


I replaced the fuel lines, so the vent would be clean. I suppose it's possible that I got them backwards, but i'm pretty sure the lines only go on one way. The yellow return line is bigger than the black fuel line.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: echo srm-210 misfires and dies after 20 minutes [Re: motor_oil_madman] #4469527
07/25/17 12:15 AM
07/25/17 12:15 AM
Joined: Apr 2016
Posts: 20
GA
DaleRider Offline
DaleRider  Offline

Joined: Apr 2016
Posts: 20
GA
I'd change the spark plug first. Then ensure you're using an 89 min. octane gas as Echo, Sthil, amongst others, are requiring in their 2-stroke engines. As Echo and Stihl both state, using reg. 87 octane gas can cause overheating and potential engine failure.

Re: echo srm-210 misfires and dies after 20 minutes [Re: motor_oil_madman] #4469608
07/25/17 05:13 AM
07/25/17 05:13 AM
Joined: May 2017
Posts: 105
Pittsburgh, Pa
Fastcompany Offline
Fastcompany  Offline

Joined: May 2017
Posts: 105
Pittsburgh, Pa
My vote would probably be crank seals. If you know you go good fuel getting in check your spark after it dies. If you have good spark you may be loosing compression after everything expands or the crank seals are leaking after they get hot and your not getting your mixture sucked in and pushed through.

Re: echo srm-210 misfires and dies after 20 minutes [Re: Fastcompany] #4473437
07/28/17 09:39 PM
07/28/17 09:39 PM
Joined: Nov 2009
Posts: 5,219
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,219
Houston, Texas
Originally Posted By: Fastcompany
My vote would probably be crank seals. If you know you go good fuel getting in check your spark after it dies. If you have good spark you may be loosing compression after everything expands or the crank seals are leaking after they get hot and your not getting your mixture sucked in and pushed through.


I wonder if they went bad after sitting for a couple years, if that's even possible.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

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